​​​Using Temporal Remote Sensing Measurements to Assess Physiological Maturity in Cotton

February 2020 | 5 min., 15 sec.
by Corey N. Thompson
Texas Tech University

Audio IconSummary Webcast IconStudy Guide IconSlide Deck Icon​​​

​​
​​​

Summary

​Temporal remote sensing measurements of plant growth may give breeders a better understanding of crop growth habits, yield, fiber quality, and maturity in cotton genotypes. The objective of this research was to derive a spectral index maturity scoring method based on the normalized difference red edge (NDRE) index. Seasonal NDRE measurements were collected from 2015 to 2017. A growth inflection point (GIP) was generated based on a quadratic fit of the NDRE growth curves for nine commercial cotton cultivars under three irrigation treatments. This GIP was the number of heat units associated with the inflection point of the NDRE values during the season. It was compared with manual measurements of crop maturity, including nodes above white flower (NAWF), percentage open boll (POB), and end-of-season plant mapping indices. Each year had environmental conditions that changed the growth habits and maturity of the cultivars. Cultivar and irrigation affected maturity in all 3 years. The GIP correlated with each maturity assessment; the highest correlations were found with NAWF (r2 from 0.38 to 0.88) by irrigation. In most cases, the relationship between NAWF and GIP was not cultivar specific, suggesting that GIP may be used across multiple cotton genotypes within multiple growing environments. The GIP method provides a method to more rapidly and objectively evaluate maturity characteristics of cotton cultivars, as well as the effects of management on these characteristics.​​

About the Presenter

Corey N. ThompsonCorey N. Thompson is a PhD Candidate at Texas Tech University working as a Field Trial Manager at BASF.​

Contact Information:
Email: corey.n.thompson@gmail.com

 Sponsorship

In 2020, Grow webcasts had more than 110,000 views. Help support our mission to provide comprehensive high-quality, science-based resources to and for plant health researchers and practitioners at no cost.

PDMR submission guidelines and schedule information are available online.

LEARN MORE

Plant Health Progress is a peer-reviewed multidiciplinary, online journal of applied plant health.

LEARN MORE